Final Report

Extreme weather events commonly encompass phenomena such as heat waves, droughts, floods and storms. In cold regions, these are augmented with snow and sea-ice related extreme events, usually triggered by anomalous atmospheric or oceanic conditions.

Although extreme events are a core climate research focus, cryospheric extremes have not received much attention yet. The overarching aim of the workshop was to review our understanding of cryospheric extreme events in the past, present and future, and to identify research needs.

The workshop was hosted by the Finnish Meteorological Institute. Around 50 participants from 11 countries attended the workshop to discuss ice and snow extremes in marine, fluvial and terrestrial settings, using meteorological, hydrological, glaciological, social, engineering and medical perspectives.



  • Overview on the impact of Arctic climate change on mid-latitudes weather and predictability of weather events from weekly to seasonal time scales, respectively.
  • New methods to detect and monitor snow and sea ice parameters from space.
  • Review of how the ECMWF forecasting system has been developed towards statistical calculation of probabilities of extreme events.
  • Several examples of weather related impacts on mortality, and a novel analysis of daily mortality at European scale and its correlation to the cold spell in February 2018.


Workshop Material

Workshop Report


Date and Location: 

25 - 27 April 2018 | Helsinki (Finland)


IASC Working Group / Committees funding the Project:


Project Lead

Jari Haapala, Veijo Pohjola


Year funded by IASC



Project Status





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